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Finding the Fourth Proportional to 100,110.81, 150,008.15 and 81,299.31

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Solution

The fourth proportional to 100,110.81, 150,008.15 and 81,299.31 is: 121,820.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,110.81 : 150,008.15 = 81,299.31 : x
  2. Step 2: Convert to fraction form
    100,110.81/150,008.15 = 81,299.31/x
  3. Step 3: Cross multiply
    100,110.81x = 150,008.15 × 81,299.31
  4. Step 4: Simplify right side
    100,110.81x = 12,195,558,682.88
  5. Step 5: Solve for x
    x = 12,195,558,682.88/100,110.81
  6. Step 6: Final answer
    x = 121,820.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.